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Window sash incorporating the new STV+IKD systems that don’t require steel reinforcement but instead are filled with insulating (IKD). The proper structural values are insured by using the newly developer adhesive tape system (STV) that adheres the sash to the glazed unit. With the use of standard steel reinforcement in the frame we can achieve exceptional U values:

Uf = 0,94 W/m2K → Uw = 0,723 W/m2K

The above values can be improved further by using thermally broken steel in the frame:

Uf = 0,91 W/m2K → Uw = 0,715 W/m2K

BERTRAND Company is a reputed manufacturer of windows, doors, facades and winter gardens. It has been present on the market since 1969 and all this time it has been fulfilling the dreams of its numerous clients in Poland, Germany, Austria, France, Ireland, Great Britain, Scandinavia, Lithuania, the USA and other countries.

The finest quality of BERTRAND products has been confirmed by a number of certificates. To manufacture joinery, the company uses the state of the art technology and a wide range of materials, i.e. different kinds of timber, PVC and aluminium profiles systems, as well as aluminium and timber and PVC and aluminium materials.

Each order is customized and our clients are advised on the best solutions to satisfy their needs. We readily undertake demanding tasks, such as replacing joinery in historic buildings. We can virtually manufacture to any design and specification upon our client’s request. We take pride in the fact that we have rendered our services to a lot of prestigious institutions and a great number of famous people connected with the world of business, politics and media.